Friction-buffer for railway-cars.



J. F. OCONNGR.

PRICTION BUFFER FOR RAILWAY GARS,

APPLICATION TIL-ED 0CT,30,1909.

J. F. OCONNOR.

PRIGTION BUFFER PoR RAILWAY GARS.

APPLICATION FILED 00T. 30, 1909. 976,903c

Patented Nov. 29, 1910.

2 SHBETSSHBET 2.

f ,q s 0 v. E mmf V m. ,m LW n ma fw i W1 TNESSES @3W Md -Uivirnn srarns PATENT oFF-1on1 JOHN F. OCONNOR, 0F CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, T0

. `WILLIAM- H. MINER, F CHICAGO, ILLINOIS.

' F'nIcTIoN-BUFFnR-Fon RAILWAY-CARS.

Specification otfLetters atent. -v Patented NOV. .29, 19.10.

Application filed October 30, 1909. Serial Nrn-525,411.

of Illinois, have invented a new and usefulA Improvement Ain I"rieti0nBui"ers for Railway-Cars of which the following is a specification. '.My invention relates 'to friction buers, the same being specially adaptedv for use upon railway passenger cars.

The object of my invention is to provide a friction buHer -of a strong, simple, eliicient and durable-construction which will accommodate and provide for a comparatively extensive movement of the buer plate as required for use on vestibule passenger cars or sleeping cars, in which the buffer plate will have a sensitive and 'quickly responsive spring cushion for the greater portion of its movement and at the same time have a powerful friction cushion for the smaller and nal portion of its movement, and in which the friction cushionin devices or elements will have a certain an reliable release action, so that the' buffer plate will be restored to normal position after each successive buffing action.

To practically accomplish this object or result, and herein my invention consists, I secure to the end frame of the car body a buffer cage, cradle or frame and mount therein the reciprocating buffer bar against which the-buffer plate acts, a -long buffer spring which reacts at its front end against a spring' cap which is interposed between the spring and buffer bar, and at its rearend against an intermediate thrust member or cylinder, and a friction shell against the front end of which the intermediate thrust member bears, and containing friction shoes, a wedge, interposed anti-friction rollers vand a short buffer springwhich reacts at one end against the friction shell and at the other end against the friction shoes, and a secondary thrust member or thimble interposedv be tween the wedgeof the friction mechanism and the spring cap against which the buffer bar acts so that after the long buffer spring has been partially compressed, preferably about t\vo-thirds, the further movement of the buffer har will act against the wedge and friction shoes and short buffer spring of the friction cushioning mechanism, thus giving, during the limited final movement of the buffer plate, .a .powerful friction cushioning action. The intermediate thrust.v member acting directly against the friction shell.l

which abuts at itsrear en d against the buffer cage'orhfra'me relieves thewedfre and friction shoesand springof the friction cushioning mechanism from the tension and pressure of the front'or long buffer spring,

so that this ,front buffer *spring does 'not interfere with the proper release action of the wedge and -frictionshoes :or-.friction cushioning mechanism. The intermediate thrust member or cylinder vwhich is interf` posed between the friction shell and, the 4 spring cap also serves as a stop to 'limit the compresslon of the front or Vlong buffer spring and prevents the saine being co1n pressed-completelysolid o r injured. 4

My invention also'consists in the novel construction of parts and devices and in the novel combinations of 'parts and -devices herein shown and described andfmore parV ticularly specified in the claims. i

In the accompanying drawing forming a,4 part of this specification, Figurel is a side elevation partly in central vertical section of a friction passenger car buffer embodying my invention. Fig. 2 is adetail horizontal section on line2-2 of Fig. 1. Fig. 3 is a detail vertical section on line of Fig. 1. Fig. 4 is a cross section on line 4-4 of Fig.

2. Fig. 5 is a. detail perspective view of the removable' ca at the rear end of the friction shell. ig. 6 is a detail perspective View of the secondary thrust member or thimble.

In the drawing, A represents a portion of the front end frame of Aa railway passenger car, B the ,buffer cage, frame or cradle, C the steel floor plate of the vestibule of the'car,

preferably secured to and supported by the buffer frame or cradle B, D'the b uerlate, E the buffer bar, F the spring cap, the long or front buffer spring, H the lnterrnediate'thrust member or cylinder, J the friction shell, K .the friction shoes, L the Wedge, M antifriction rollers, N the secondary thrust member or thimble, P the connectmg bolt between thervedge and the removable cap J1 of the friction shell and R the Short buffer spring of the friction cushioning mechanism.

The buffer cage, cradle or frame B 1s secured to or forms part of the framework ofthe car and is provided with suitable'bearyings or supports I) b1 to receive the buffer bar E, and with a chamber B1 beneath the vestibule plate C to receive the buffer cush? ioning devices, and with saddles or seats b2 b2 b3 Z13 for supportin the friction shell J, the spring cap F an the intermediate thrust member or cylinder H, and with depending wings or arms b4 to receive the draft rigging of the car coupler. The spring cap F is preferably cylindrical and its front head f is furnished with a socket f1 to receive the rear end of the buffer bar E. The

.spring cap F is provided at its rear end with a projecting flange or arm 2 the enlarged front end l1. off t thrust member or cylinder H when both the to abut against front or long buffer spring G and rear buffer spring R are compressed to their full extent.' The intermediate thrust member or cylinder H is referably cylindrical in form and is provi ed with an internal shoulder or seat- /rl for the rear end of the front or longbuffer spring G to bearagainst. The intermediate thrust member or cylinder H is. provided at its rear end with a shoulder h2 to bearagainst the front end of the friction shell J and a bell or enlargement Je? to surround-or embrace the front end of the friction shell. The friction shell J is preferably cylindrical in form and has an internal friction face in sliding frictional engagement with therexternal friction faces of the' segmental friction shoes K. The friction shoes- K are preferably three vin number and each has a wedging or inclined inner face K1 andstop shoulder K2 for the anti-friction roller AN is furnished with an external flange or rim 'a which engages the internal-flange or shoulder 11.1 of the intermediate thrust member H. The secondary thrust member or 4thimble N is also. provided with an inwardly projecting flange 11,1 at its front end to afford an extended bearing against the' spring cap F, and" also with" an inwardly projecting ange n2 at its rear end to give it a better seat against the wedge' L. The Wedge L is preferably hollow and provided with a shoulder L3 to engage the head of the connecting bolt P which extends throu h the short or rear buffer spring R and t e small spring R1 which preferably fits within the rear spring R. The connecting rod P has a nut p at its rear end which-engages he intermediate` evepo the removable cap'J1 with which the fric--l tion shell J is provided at its rear end.- 4The removable cap or block J1 serves asa centering device or guide'for the' rear spring R and as a seat for the small spring R1 to 'bear against. The front or long spring G preferably has about three times the compressing movement. of the rear springs R R1. During the greater part of the rear- .-.wa rd or bufling movement of the buffer plate, vthe main buffer spring G onlyis vcompressed, the main spring G thus serving to cushion'all the frequent-and smaller movements of the bufer plate and 'giving it a quickly responsive movement and sensitive action. Under heavier blows and more extended movements of the buffer plate, the friction cushioning mechanism comes into play and aiiords a very powerful cushioning action, thesame acting in multiple with the main spring G, the-anti-friction rollers interposed between the friction shoes and Wedges in' connection with the intermediate thrust member H, which relieves the.wedge .from the direct and constant tension of the4 main, spring G, venabling the cushioning mechanism to always certainly, quickly and promptly 4release 'or return to normal position after each bufiing action.

By my improved combination vand arrangement of devices cpnstitu'ting my friction buffer, it will vbe seen that, for example, when the springls G and R are fully compressed under a eavy butiingblow, that any release movement vof the spring cap F will' instantly be followed up by the frictionaldevices, the wedge L keeping the intermediate compression' member N always against the spring cap F until the friction; devices are returned completely to their full release position, afnd thus insures that thefrictional or heavy cushioning mechanism will always be in position to receive a succeeding blow. In the release movement after the friction shoes have been returned to normal position, the further release' movement of the s ring cap F under action of the spring G w restore the parts to' the position shown in Fig. 2. 7 l claim 1. In a friction buffer'for railway cars,

the .combination with a buffer cage having a saddle for receiving and supporting the .buffer bar and its cushioning devices, of a buffer bar, a spring cap engaging said'bar, an intermediate thrust member, a main buffer spring interposed between said spring cap and intermediate thrust member,'a -friction shell engagin` said intermediate thrust member at one en and said buffer cage at' the other,a spring, friction shoes, a wedo'e with interposed anti-friction rollers within said shell and a secondary thrust member interposed between said wedge and said spring. cap. to transmit the thrust of the an intermediate thrust-member, a main buf- With interposed anti-friction rollers within stant'ially as specified.

erases fer spring inter nosed between 'said spring cap and intermediate thrust member, a friction sheil engaging said intermediate thrust member at one end and said buffer cage at the otherga spring, friction shoes, a Wedge said shell and e secondary thrust member interposed between said Wedge and said spring cap t0 transmit the thrust of the buer bar to said Wedge and friction shoes after the main buffer spring has beeny partially compressed, said secondary thrust .member having' an externaily projecting flange adapted to engagesaid intermediate thrust member-{sub- 3.|In a friction buffer, the, combination with a buffer bar and spring cap, ofa friction shell having a spring, friction shoes and wedge therein, a main buffer sp'rin'g in- -after said main -gether to resist and cushion the final terposed between said spring sap and said friction shell and a secondary thrust mem ber interposed between said Wedge and said spring cap and operating 'to transmit the pressure of the bliifer bar to the wedge, frio- `tion shoes and said spring within said friction of said main. buer spring 35 Ishell independent spring has been partially compressed, both said springs coacting. to-

portion of the buffer bar movement, substantially as specified.

1i. In a friction bu'i'er, the combination with a buffer bar, spring ap and main vbuffer spring reacting against said cap, of a friction'shell against which said main but. fer spring rets, a spring, friction shoes andwedge Within said shell, and a secondary thrust member interposed "between said Wedge and said spring cap and operating to transmit the pressure of the buii'er bar te the Wedge independent of said main buffer 5o Spring, substantially as speciiled JOHN F. CONNUE. Witnessesr EDMUND Anwen, PEARL ABRAMS. 

